I have used 4 inch heavy wall channel iron.Angle it inward(approx 30 degrees more or less)8-10 inches from each end,weld in some frame brackets and bolt it on.It looks beefy and gives you a good mounting point for a trailer hitch later on.

Wanted Good Woman:
Must be able to cook , clean , sew , tune engines and polish trucks. Must have old Stovebolt and garage. Please send picture of old Stovebolt and garage.